Installation method of integrated unit modules for biplane passageways of an LNG ship

Abstract

This invention relates to an installation method for integrated unit modules of the port and starboard passageways on LNG carriers. The LNG carrier has passageway sections on both sides. The installation method includes the following steps: setting the layout positions of the main outfitting components such as pipelines, cable trays, and passageway platforms within the passageway sections; integrating the main outfitting components within the passageway sections into integrated unit modules; assembling the modules during the construction of the passageway sections using the upper deck as a base; hoisting the integrated unit modules; and completing the installation of the integrated unit modules for the port and starboard passageway sections of the LNG carrier. This invention's installation method for integrated unit modules of the port and starboard passageway sections on LNG carriers optimizes the layout positions of pipelines, cable trays, and passageway platforms within the passageway sections, achieving integrated unit module design for the passageway section outfitting. It also moves the work from the original sectioning stage to the mid-assembly stage, thus advancing the process, improving construction efficiency, and shortening the construction cycle of the LNG carrier.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, specifically to an installation method for a comprehensive unit module for the biplane passageway of an LNG ship. Background Technology

[0002] Currently, all LNG shipyards aim to improve the construction efficiency of LNG ships. The space in the side passageways of LNG ships is limited, and the arrangement of outfitting components such as internal pipelines, cables, cable trays, and passageway platforms is relatively dispersed. Currently, the outfitting work for internal pipelines, cable trays, and passageway platforms in the side passageways of LNG ships is carried out in sections through piecemeal assembly. This method has the following drawbacks:

[0003] (1) The pipeline is located at the top of the channel, the cable tray is located on the inner wall of the outer plate of the channel, and the channel platform is located at the bottom of the channel. Therefore, it is impossible to design it in a modular manner, which is not conducive to improving the construction efficiency of LNG ships.

[0004] (2) Because the outfitting work inside the channel is carried out in sections, the work needs to be carried out in the section yard, and the truck crane is needed to lift and transport various outfitting parts. Therefore, it requires a lot of manpower, consumes a lot of time, occupies the section yard for a long time, and occupies truck crane resources. This method has low installation efficiency and will prolong the overall construction cycle of the LNG ship.

[0005] The prior art (CN114954835A) discloses an installation method for cryogenic pipe unit modules on the deck of an LNG ship. This method integrates the cryogenic pipes on the port and starboard sides of the manifold area into unit modules during the platform stage, transferring most of the installation work of the cryogenic pipes that originally needed to be assembled in bulk to the front. During the onboard installation, only the port and starboard deck cryogenic pipe modules need to be hoisted onto the ship as a whole to install all the cryogenic pipes in one go. This not only improves the installation efficiency of this part of the cryogenic pipes, but also eliminates the need for secondary adjustments to the installation accuracy of this part of the cryogenic pipes during subsequent construction. However, it does not mention how to install the outfitting components in the passageway area on both sides. Summary of the Invention

[0006] To address the technical problems existing in the prior art, this invention provides an installation method for integrated unit modules of the two-sided passageway sections of an LNG ship. This method realizes the integrated unit module design for the outfitting of passageway sections, moves the original sectioning stage work forward to the mid-assembly stage, thus advancing the process, reducing the LNG ship construction cycle, and improving construction efficiency.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] An installation method for a multi-section integrated unit module for the port and starboard passageways of an LNG carrier, wherein the LNG carrier has passageway sections on both its port and starboard sides, the installation method includes the following steps:

[0009] Step 1: Set the layout of the main outfitting components within the passage segment;

[0010] Step two: Integrate the main outfitting components into comprehensive unit modules;

[0011] Step 3: During the segmented construction of the passageway, the assemblies are built on the inclined upper deck as the base surface, and the hoisting of the comprehensive unit modules is completed during the assembly stage on the inclined upper deck.

[0012] Step 4: Complete the installation of the integrated unit modules for the port and starboard side passages of the LNG ship according to the above steps.

[0013] As a preferred technical solution, the main outfitting components include pipes, cable trays, and channel platforms. The pipes are pipe outfitting components, the cable trays are electrical outfitting components, and the channel platforms are iron outfitting components.

[0014] As a preferred technical solution, in step one, the pipeline is laid on the inclined plate of the channel segment; the cable guide is laid between the bottom of the channel and the outer wall of the segment; and the channel platform is set at the bottom of the channel.

[0015] As a preferred technical solution, the integrated unit module is formed by connecting the pipe outfitting components, electrical outfitting components, and iron outfitting components using a U-shaped bracket.

[0016] As a preferred technical solution, in step three, the assembly construction of the upper deck includes the following steps: using the upper deck as the base surface, the upper plane is segmented and assembled in a production line, and longitudinal ribs are welded to form the secondary middle assembly of the upper deck; using the trap deck as the base surface, longitudinal ribs and various rib plate components are welded to form the secondary middle assembly of the trap deck; using the secondary middle assembly of the upper deck as the base surface, a flat jig is installed and various rib plate components are welded; the integrated unit is hoisted; the secondary middle assembly of the trap deck is welded, and the passage area is covered and closed to complete the assembly construction of the upper deck and flow to the segmented large assembly.

[0017] As a preferred technical solution, in step three, the hoisting of the integrated unit module includes the following steps: installing the unit gantry, lifting the integrated unit module horizontally and then flipping it 90° by changing the hook, and installing the unit bracket; completing the hoisting support positioning on the secondary mid-section of the inclined deck through the bracket; performing hook welding and removing the unit bracket to complete the installation work of the unit in the assembly stage of the passage segment.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) This invention provides a method for assembling and installing integrated unit modules of U-shaped pipe outfitting, electrical outfitting, and iron outfitting within the port and starboard side passageway sections of an LNG ship. Because the arrangement of the passageway section pipelines, pipe supports, cable trays, and passageway platforms has been optimized, the outfitting components within the passageway are more concentrated, thus integrating the pipe outfitting, electrical outfitting, and iron outfitting into integrated unit modules. Compared to existing technologies that use truck cranes to continuously assist alongside the sections, this invention enables the installation of unit modules with a single crane lift, significantly saving factory crane resources and reducing the lifting work for passageway section outfitting, thereby improving outfitting efficiency. For large LNG ships, the two side passageway sections are divided into 24 units; this invention reduces the outfitting operation cycle for a single passageway section by approximately two days.

[0020] (2) Because the present invention completes the unit hoisting in the mid-assembly stage, it can realize the shift of the existing field outfitting work in the segmented yard stage to the mid-assembly of the segmented jig for in-field fabrication, reducing the risk of production progress being affected by factors such as weather, greatly improving the working environment, and providing a strong guarantee for orderly production.

[0021] (3) This invention optimizes the assembly and construction process of the channel segment inclined upper deck and the hoisting process of the comprehensive channel unit module. Through the cooperation of the two, the comprehensive unit module can be successfully hoisted into place during the assembly stage of the channel segment inclined upper deck, thereby realizing the forward movement of LNG ship construction process and outfitting, reducing the stacking time of the segments, improving the turnover rate of the segments, significantly reducing the overall production cost, effectively shortening the LNG ship construction cycle, especially the outfitting cycle of the channel area, and further improving the overall construction efficiency of the factory LNG ship. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the arrangement of pipelines within a channel segment in the installation method of a comprehensive unit module for the biplane channel of an LNG ship according to the present invention.

[0023] Figure 2 This is a schematic diagram showing the arrangement of cable trays within a channel segment in an installation method for a comprehensive unit module of a two-sided channel segment of an LNG ship according to the present invention.

[0024] Figure 3 This is a schematic diagram showing the arrangement of the channel platform within the channel segment in the installation method of the integrated unit module of the two-side channel of an LNG ship according to the present invention.

[0025] Figure 4 This is a structural schematic diagram of a multi-section integrated unit module for the two-side passage of an LNG ship according to the present invention;

[0026] Figure 5This is a schematic diagram of the assembly and construction process of the inclined upper deck in the installation method of the integrated unit module of the two-side passage of an LNG ship according to the present invention.

[0027] Figure 6 This is a hoisting schematic diagram of a multi-section integrated unit module for the two-side passage of an LNG ship according to the present invention;

[0028] Figure 7 This is a schematic diagram of the flipping of a multi-section integrated unit module for the two-side passage of an LNG ship according to the present invention;

[0029] Figure 8 This is a schematic diagram of the installation bracket for a multi-section integrated unit module of the two-side passage of an LNG ship according to the present invention;

[0030] Figure 9 This is a schematic diagram of the hoisting and positioning of the unit of the present invention during the assembly stage on the inclined upper deck;

[0031] Figure 10 This is a schematic diagram showing the final installation of the unit in the assembly stage of the present invention.

[0032] In the diagram: 1. Integrated unit module; 11. Piping; 12. Cable tray; 13. Passage platform; 2. Sloping side plate; 3. Segmented outer wall; 4. Passage bottom; 5. Unit hanger; 6. Unit bracket; 7. Rib plate component; 8. Upper deck secondary mid-section; 9. Enclosure deck secondary mid-section. Detailed Implementation

[0033] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0034] An installation method for a comprehensive unit module 1 for biplane passageways on both sides of an LNG carrier, wherein the LNG carrier has passageway sections on both the port and starboard sides, and the installation method includes the following steps:

[0035] Step one involves optimizing the layout of key outfitting components within the channel segment, such as pipes 11, cable trays 12, and channel platforms 13. Figure 1 As shown, pipe 11 and pipe supports are laid on the inclined side plate 2 of the channel segment; as Figure 2 As shown, the cable tray 12 is laid between the bottom 4 of the channel and the outer wall 3 of the segment; as Figure 3 As shown, the channel platform 13 is set at the bottom 4 of the channel. Among the main outfitting components, the pipe 11 is a pipe outfitting component, the cable tray 12 is an electrical outfitting component, and the channel platform 13 is an iron outfitting component.

[0036] Step two, as Figure 4 As shown, after optimizing the layout of the main outfitting components, due to the compact arrangement between the outfitting components, U-shaped brackets can be used to connect and integrate the pipe outfitting components, electrical outfitting components, and iron outfitting components into a comprehensive unit module 1;

[0037] Step 3, during the segmented construction of the passage, such as Figure 5 As shown, using the upper deck as the base surface, the upper plane is segmented and assembled in a production line, and longitudinal ribs are welded to form the secondary middle group 8 of the upper deck; using the trap deck as the base surface, longitudinal ribs and various rib plate components 7 are welded to form the secondary middle group 9 of the trap deck; using the secondary middle group 8 of the upper deck as the base surface, a flat jig is installed and various rib plate components 7 are welded; the integrated unit is hoisted; the secondary middle group 9 of the trap deck is welded, and the passage area is covered and closed to complete the construction of the upper deck middle group and flow to the segmented large group;

[0038] The hoisting of the integrated unit module 1 includes the following steps: installing the unit hanger 5, such as... Figure 6 As shown, the integrated unit module 1 is lifted horizontally, as... Figure 7 As shown, the integrated unit module 1 is flipped 90° by turning and changing the hook, as follows. Figure 8 As shown, the mounting unit bracket 6; as Figure 9 As shown, the hoisting support and positioning are completed on the secondary midship group 8 of the inclined upper deck using brackets; as... Figure 10 As shown, perform loosening welding and remove unit bracket 6 to complete the installation of the unit in the channel segment assembly stage.

[0039] Step 4: Complete the installation of the integrated unit module 1 for the port and starboard side passages of the LNG ship according to the above steps.

[0040] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. Those skilled in the art can make non-inventive modifications to this embodiment as needed after reading this specification, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for installing a multi-span integrated unit module for the port and starboard passageways of an LNG carrier, wherein the LNG carrier has passageway sections on both its port and starboard sides, characterized in that... The installation method includes the following steps: Step 1: Set the layout positions of the main outfitting components within the channel segment. The main outfitting components include pipes, cable trays, and a channel platform. The pipes are pipe outfitting components, the cable trays are electrical outfitting components, and the channel platform is a steel outfitting component. The pipes are laid on the inclined side plate of the channel segment; the cable trays are laid between the bottom of the channel and the outer wall of the segment; and the channel platform is located at the bottom of the channel. Step 2: Integrate the main outfitting components into a comprehensive unit module. The comprehensive unit module is formed by connecting the pipe outfitting components, electrical outfitting components, and iron outfitting components using a U-shaped bracket. Step 3: During the segmented construction of the passageway, the upper deck is used as the base surface for the assembly. The comprehensive unit module is hoisted during the upper deck assembly stage. The upper deck assembly includes the following steps: using the upper deck as the base surface, the upper plane is segmented and assembled in a streamlined process, longitudinal stiffeners are welded, forming the secondary upper deck assembly; using the trap deck as the base surface, longitudinal stiffeners and various rib plate components are welded, forming the trap deck secondary assembly; using the upper deck secondary assembly as the base surface, a planar jig is installed and various rib plate components are welded; hoisting... The process involves assembling integrated units; welding and installing the secondary mid-section of the containment deck; closing the cover plates in the passageway area; completing the erection and construction of the upper deck mid-section and moving it towards the main section assembly. The hoisting of the integrated unit module includes the following steps: installing unit jacks; lifting the integrated unit module horizontally and then rotating it 90° by changing hooks; installing unit brackets; completing the hoisting support and positioning on the upper deck secondary mid-section using the brackets; performing hook welding and removing the unit brackets to complete the installation work of the unit in the passageway section assembly stage. Step 4: Complete the installation of the integrated unit modules for the port and starboard side passages of the LNG ship according to the above steps.

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